Hanna Instruments HI 98170 - Manual (Page 21)

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• When the reading is stable and close to the selected standard, the “CFM”
tag blinks.
• Press CFM to confirm calibration. The instrument
stores the calibration value and returns to normal
measurement mode.
Notes: • If the new slope is out of slope window or the mV value is out of mV
range (±2000), “WRONG” tag will blink. In this case check if
the correct standard has been used, or refresh the electrode by
following the Cleaning Procedure (see page 43). If necessary,
change the standard or the electrode.
• Slope window is between ±20 mV and ±120 mV if ion charge
is not specified (undF selected in SETUP menu) or between 50%
and 120% of default slope for the corresponding ion charge.
Default slope value (mV/decade):
–59.16 (monovalent anion) - ion charge is –1
59.16 (monovalent cation) - ion charge is 1
–29.58 (divalent anion) - ion charge is –2
29.58 (divalent cation) - ion charge is 2
100 - ion charge is “undF”
• Press 2nd then CLR in any moment dur-
ing calibration. The “CLr ALL” message
will be displayed on the LCD along with
”OLD” tag.
All old calibrations, starting with current selected standard are
cleared and the instrument continues calibration.
• The instrument will display “----” on the primary LCD if it is not
calibrated or after all calibrations are cleared.
Note: If CLR is pressed during the first calibration point, the instrument
returns to measurement mode.
• Press 2nd then MODE to display the temperature
reading on the LCD during calibration.
FOUR, THREE, TWO or ONE-POINT CALIBRATION
• Proceed as described in “FIVE-POINT CALIBRATION” section.
• Press CAL after the appropriate accepted calibration
point. The instruments will return to measurement
mode and will memorize the calibration data.
AutoEnd CLR
CAL GLP
MODE
LOG CFM